Electromagnetic Force Investigation 1

A Plant is sitting on a table. What, if any forces are acting on the plant? (If there are forces acting on the plant, include what direction they are acting.)

• A magnet is pushing the plant down.

• Gravity is pulling down and the table is pushing up.

• The wind is pushing on the plant.

• The table is pushing down on the plant and gravity is holding the plant up.

Tags

NGSS.MS-PS2-4

A student pushes a cart against a wall exerting 500 N of force. The cart doesn't move.

How do you explain what happened?

• The wall pushes back with 1,000 N of force.

• The wall pushes back with 250 N of force.

• The wall pushes back with 500 N of force.

• Walls are stationary: they can't push or pull.

Tags

NGSS.MS-PS2-1

A student pushes a cart against a wall exerting 500 N of force. The cart doesn't move. What can you say about the forces?

• The net force is 0 because the cart is not moving.

• The net force is greater than 0 because the wall could push back more.

• There is no net force because a wall can't push or pull.

• The net force is less than 0 because the person is pushing on the wall.

Tags

NGSS.MS-PS2-2

In order to move a carton of books across a table A, a student had to push with 15 N of force. In order to move a carton of books with the same mass across table B, the student had to push with 25 N of force.

Which table has a smoother surface?

• Table A

• Table B

Tags

NGSS.MS-PS2-2

In order to move a carton of books across a table A, a student had to push with 15 N of force. In order to move a carton of books with the same mass across table B, the student had to push with 25 N of force.

Which table has a smoother surface?

What is your evidence?

Tags

NGSS.MS-PS2-2

Aristotle had ideas developed from thought experiments about force that people believed for more than 2,000 years. In the 1600s, Galileo conducted investigations with objects and presented new ideas about force. Which great thinker had better evidence to support his claims?

• Aristotle, because he was the first to describe the motion of objects.

• Aristotle, because he used thought experiments to support his ideas.

• Galileo, because he used ball-and ramp experiments to support his ideas.

• Galileo, because he was a scientist rather than a philosopher.

Team A pulls on a rope in a game of tug-of -war with 1,800 N of force. Team B pulls on the other side of the rope. In between the teams is a mud pit. How much force does Team B need to use in order to pull Team A into the mud?

• 1,800 N

• 500 N

• Any force greater than 1,800 N

• 2,000 N

Tags

NGSS.MS-PS2-1

Three young children are fighting over where to take Super Dog. Child X pulls the wagon, trying to go in the direction of his house. Child Y pushes on the wagon toward the same house. Child Z pushes on the wagon, trying to move it in the opposite direction. The forces from the three children being exerted on the wagon are 300 N, 500 N, and 200 N ( not necessarily in XYZ order).

If the wagon isn't moving, how much force is Child Z exerting on the wagon?

• There is not enough information to determine Child Z's force.

• 200 N

• 300 N

• 500 N

Tags

NGSS.MS-PS2-2

Which statement is an example of a situation where net force is 0 N.

• Two people pushing equally on the same side of a couch moving across the floor.

• Two people pushing a couch equally from opposite sides.

• Two people lifting a couch.

• A couch sliding across a frozen lake.

Tags

NGSS.MS-PS2-2

Which statement is an example of a situation where net force is 0 N.

• A couch sliding across a frozen lake.

• A couch coming to a stop on the frozen lake.

• A couch falling through the ice.

• A couch sitting still on a frozen lake.

Tags

NGSS.MS-PS2-2